Electric Field Effect on Frenkel-Wannier-Mott Exciton States in Organic-Inorganic Semiconductor Quantum Wells

Abstract

Organic and inorganic semiconductor nanostructures are the subject of many recent investigations. The ability, in the near future, to synthesize composite organic/inorganic semiconductor heterostructures is of crucial importance not only in the development of novel nanostructured materials for electronics, optics, transport..., but also for understanding their size-dependent physical properties. Recently^1–3 a new type of elementary states generated by optical exicitation are hybrid excitons which can be obtained from the resonant mixing of Frenkel-Wannier-Mott excitons in organic/inorganic quantum wells. This novel system, the hybrid excitons localized in organic/inorganic semiconductor heterostructure, is expected to show characteristic physical properties and also provide a basis for new electrooptic technology. The hybrid excitons acquire the properties of both types of excitons. They have very strong oscillator strength like Frenkel excitons. They are delocalized and possess a large size like Wannier-Mott excitons, then they are sensitive to external pertrubations, namely electric and magnetic field effects.